A scientist would most likely need to update her model when it no longer supports the latest results.
22 is a
23 is d
24 is c
I believe the answers are correct.
Answer is 3Mg + N2 —--> Mg3 N2
Answer:
c
Explanation: just a chemachal
First, they may produce direct and relatively short-lived effects, such as stimulation of the isolated uterus or relaxation of the isolated tracheal chain preparation.
Secondly, in doses too low to produce a direct effect, they may produce a long-term potentiation of the effects of other stimulants.